Case for transformers and the like.



C. H'. THORDARSON. CASE FOR TRANSFORMERS AND THE LIKE. APPLICATION FILEDJAN. 22. 1917.

1,288,752. Patented Dec. 24,1918.

MH HIWFIH.

4; NIH I! HHH H I UNITED sTATEs PATENT. OFFICE.

CHESTER H. rHoBnARson', OF'GHICAGO, ILLINOIS.

casn r03 m msronmnns AND THE LIKE.

To all whom it may concern: Be it known that I, CHESTER H. THoRnAn- SON,a citizen of the United States, and a resident of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Cases for Transformers and the like; and I do herebvdeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and to thecharacters of reference marked thereon, which form a part of thisspecification.

This invention relates to a novel case for small electricaltransformers, such as bell ringing transformers and refers morespecifically to novel means of forming attaching lugs onthe case bywhich-'to' attach the case to a support.

It is the practice, and is required, to space the transformer case awayfrom its support by means of suitable fastening devicesso as to permitcirculation of air between the case and its support.

It is the purpose of this invention to produce an exceedingly simple,economical and eflicient form of attaching lugs .by which the case isattached to the support and the invention consists in the combinationand arrangement of the parts shown in the drawings, and described in thespecification, and is pointed out in the appended claims.v

In the drawings:

F igure l is aside elevation .of a transformer case, embodying myinvention.

the case on which the attaching lugs are formed. v

Fig. 3 isan end, view of said wall. The case 10, which is-made of sheetmetal,

comprises a ends, and two end wall members 12, 13,

which are provided with flanges 14, 15 that overlap the body 11 of thecase at its open ends.

'16 and 16', 1'6 ing' the case to a support, as the vertical wall 17. Inaccordance with thepresent inven- .tion the-said lugs are formedprincipally of material cut away fromthe rim 15, said material beingleft integral with the end wall I of the case along the lines 18'atwhich the lugs are joined to said 'end wall. The terminals of said lugsare turned outwardly to form feet 20,- Which are apertur'ed to receivefastening screws.

I Specification of Letters Patent.

Fig. 2 is a perspective view of one wall'of I main body 11, opened'atboth.

With integral attaching designate lugs for attachas my invention, Ihereunto append Patented Dec. 24, 1918.

- Application filed January 22. 1917. Serial u 143,677.

Preferably, and as herein shown, the wall plate 13 is provided withthree attaching lugs,-one at one end and two at the other end, givingthree point support for the case.

he manner of forming the lugs from the case wall shown and describedproduces an exceedingly strong and rugged lug with the use of but littlemore metal than is required to form the flange orrim 15 of the end wall,and the removal of the metal from said flange or rim to not to anyappreciable extent weaken the at- 'taohm'ent of the flanged end wall tothe body of the case. Furthermore, the method shown of producing saidlugs is an exceedingly economical one, there being no parts required tobe attached by rivets or like fastening devices. Moreover, the work required to produce lugs is entirely a die or swaging operation; thereforethe labor cost of producing the device is greatly lessened.

' lugs formed principallyfrom the metal 0 the. flanges of said cover atopposite ends thereof and turned outwardly at an angle to said cover inadirection opposite to said flange. 1'

2. A sheet metal wall for acase of the character set forth telescopeover the case and which has interruptions at opposite ends wall beingprovided at said interruptions angles to the wall and extending indirections opposite to the Whollv in rear of said'flange.

- In witness whereof I claim the foregoing my signature in the presenceof two witnesses at Chi7cago, Illinois, this 10th day of January, 191

oHEsTERH. THORDARSON.

Witnesses:

W; L. HALE, A. E. WALBRIDGE.

produce the lugs does provided with an integral surrounding flangeadapted to externally of the Well, said 95 lugs disposed'atflange andlocated I

